查询词典 flutter valve

It is understood that only Valve Factory Co., Ltd., Beijing, Gansu Pingliang 九二○ Factory, Chengdu aircraft instrument company trap plants, Yongjia County, Valve Factory, Long into a trap plant, the second valve plant in Shenyang, Dalian High Pressure Valve Co., Ltd., Yangzhou valve factory is still producing steam trap, but most manufacturers do not test apparatus, the Chengdu aircraft instrument companies only trap plants have PN6.5MPa, 600kg and total evaporation of the boiler performance test devices, Pingliang 九二○ Factory, Yangzhou valve factory has performance test equipment, Beijing Valve General Factory Co., Ltd.

据了解，目前仅有北京市阀门总厂有限责任公司、甘肃平凉九二○厂、成都航空仪表公司疏水阀厂、永嘉县阀门厂、隆成疏水阀厂、沈阳第二阀门厂、大连高压阀门有限公司、扬州阀门厂等还在生产蒸汽疏水阀，但大多数生产企业都没有试验装置，只有成都航空仪表公司疏水阀厂有PN6.5MPa、600kg蒸发量的锅炉及全性能试验装置，平凉九二○厂、扬州阀门厂有性能试验装置，北京市阀门总厂有限责任公司等有出厂试验装置，但试验压力很低，与没有试验装置相差无几。

Selection of safety valve Decided by the operating pressure safety valve nominal pressure, the decision by the operating temperature range of temperature safety valve from the computed value of the decision constant pressure safety valve spring or a lever set pressure range, then the safety valve according to the decision to use media materials and structure type, and then calculated according to the safety valve Discharge valve throat diameter.

安全阀的选用由操作压力决定安全阀的公称压力，由操作温度决定安全阀的使用温度范围，由计算出的安全阀的定压值决定弹簧或杠杆的定压范围，再根据使用介质决定安全阀的材质和结构型式，再根据安全阀泄放量计算出安全阀的喉径。

Using the flutter model of two-dimensional wing with external store, the effects of pylon stiffness on the flutter speed and the evolution of wing store flutter modes with the variation of pylon stiffness are analysed.

以带外挂二元机翼为计算模型，分析了外挂联接刚度对颤振临界速度的影响以及机翼／外挂系统颤振模态随外挂联接刚度的演化。

Based on the flutter equation developed, the influences of mistuning level and distribution on the flutter characteristics of the assemblies are investigated in detail, and two criteria for distribution optimization are proposed. The influences of structural coupling on the effectiveness of mistuning on flutter control are studied.

根据建立的颤振方程，详细研究了失调分布对非谐调叶盘颤振特性的影响，给出了最优错频分布的两个准则，研究了结构耦合对错频抑制颤振效果的影响。

Fixed ball picture ball valve fixed ball valve Fixed chart The advantages of a fixed ball valve 1, sealing grease emergency ambulance: As the foreign media or fire accidents caused by failure of the valve seat Plug Valves seal, valve grease and grease gun providing fast connection, easily and quickly injected into the valve seat seal grease seal parts, ease leak .

固定球阀图片固定球阀结构图固定球阀固定球阀的优势 1、密封紧急注脂救护：由于介质中的异物或火灾造成阀座密封意外失效，注脂阀提供了与注脂枪的快速连接，方便快捷地将密封脂注入到阀座密封部位，缓解泄漏。

The main materials are as follows:Carbon steel,low temperature steel, dual phase steel (F51/F53) titanium alloy, aluminum bronze,inconel,SS304、SS304L、SS316、SS316L;chrome-molybdenum steel,Monel(400/500),20#alloy,Hayne's alloy etc.The main products are:check valve,ball valve,gate valve,globe valve, butterfly valve,plug valve etc.we aslo can privide special and non-standarded valves to Satisfy our customer demands.

主要材质有：碳钢、低温钢、双相钢(F51/F53)钛合金、铝青铜、因科镍尔、SS304、SS304L、SS316、SS316L，铬钼钢、蒙乃尔(400/500)、20#合金、哈氏合金等金属材料，止回阀，球阀，闸阀，截止阀，蝶阀，旋塞阀等非标特殊阀门。

Piston check valve flap Rubber Flapper Swing Check Valves, Oil Control Bottom Buffer along the vertical center line of sliding valve check valve, check valve with internal thread can only be installed in horizontal pipes, in the high-pressure small-bore ball valve on the valve flap can be used.

活塞式止回阀瓣沿着阀体垂直中心线滑动的止回阀，内螺纹止回阀只能安装在水平管道上，在高压小口径止回阀上阀瓣可采用圆球。

Lift-type check valve structure improvement Lift Check valves, also known as the end, it can maintain the required suction pump to stop the water Globe Style Silent Check Valves column; the valve structure is characterized by improvements in the main valve between the valve flap and valve stent slow addition of a Vice-valve closed.

升降式止回阀结构改进升降式止回阀又名底阀，它可以保持停泵时抽吸所需水柱；该阀结构改进的特点是在主阀阀瓣与阀体支架间增设一缓闭副阀。

Lift-type check valve structure improvement Lift Check valves, also known as the end, it can maintain the required suction pump to stop the water Globe Style Silent Check Valvescolumn; the valve structure is characterized by improvements in the main valve between the valve flap and valve stent slow addition of a Vice-valve closed.

升降式止回阀布局改进升降式止回阀又名底阀，它可以连结停泵时抽吸所需水柱；该阀布局改进的特点是在主阀阀瓣与阀体支架间增设一缓闭副阀。

Numerical simulations were done for a bistable latch valve of the system by FLUENT, and three groups of datum for different fluids were obtained with the same effective exit sectional area. Besides, a static mathematic model for the electromagnetic valve was established based on the obtained datum. Secondly, the motion of the valve spool was realized by UDF file in FLUENT. Three kinds of motions, uniform, acceleration and motion driven by the coupling effect of the liquid resistance and the electromagnetic force, were calculated and compared. The dynamic characteristic of the electromagnetic valve was obtained by analyzing the relationship of the mass flow rate of the inside flow field of the electromagnetic valve, the change of the drop pressure of the passageway of the valve, and motion time.

并针对系统中的某双稳态电磁阀，使用商用CFD软件FLUENT对其进行内部流场的数值模拟，通过使用不同流体介质，不改变阀门有效出口截面积的情况下，分析得到的三组数据，建立了该电磁阀的静态数学模型；通过编写UDF文件，实现对阀芯运动方程的控制，在阀门做由闭合到开启、开启到闭合运动时，控制阀芯分别做匀速运动、匀加速运动以及阀芯受到液体阻力与电磁力作用力的耦合力的运动，分析了三种工况下电磁阀内部流场质量流率和阀门出口入口压降的变化以及运动时间，从而得到该电磁阀的动态特性。

Aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales.

生活于水中或湿地的蕨类；从新生代生存至今；有时归于石松目之中。

The engine was uprated from a 90hp Franklin to a 125hp Lycoming.

改良过的引擎是从90hp到125hp莱康明富兰克林。